[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fK2LRmFHQK9kc0k3BKWveJCQsuGR-a60gAVMzC6A_J6E":3},{"article":4,"iocs":46,"watch_terms":55,"solutions":56,"lesson":147},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"url":11,"image_url":12,"published_at":13,"ingested_at":14,"relevance_score":15,"entities":16,"category_id":28,"category":29,"article_tags":33},"931ad7b3-13ee-489d-a89b-a7f8104c4bfa","Windows SignDrop 0-Day Exploit Lets Attackers Gain SYSTEM Privileges Through CLFS Protection","windows-signdrop-0-day-exploit-lets-attackers-gain-system-privileges-through-clf-88f6de","A public exploit called SignDrop targets a Windows security feature meant to stop attacks on the Common Log File System (CLFS). It claims to turn a normal user account into a SYSTEM account, the highest level of control on Windows. The flaw has no CVE number and no patch as of November 11, 2026. Microsoft […] The post Windows SignDrop 0-Day Exploit Lets Attackers Gain SYSTEM Privileges Through CLFS Protection appeared first on Cyber Security News.","A public exploit named SignDrop targets a Windows security feature designed to protect the Common Log File System (CLFS), potentially allowing a normal user to gain SYSTEM privileges. The flaw, which has no CVE number or patch as of November 11, 2026, was posted as a proof-of-concept on GitHub by researcher MSNightmare. While it's a local privilege escalation bug requiring prior access, it's estimated to affect a significant portion of Windows installations.","Windows SignDrop 0-day exploit allows SYSTEM privilege escalation via CLFS protection.","https:\u002F\u002Fcybersecuritynews.com\u002Fwindows-signdrop-zero-day-exploit\u002F","https:\u002F\u002Fcybersecuritynews.com\u002Fwp-content\u002Fuploads\u002F2026\u002F11\u002FWindows-SignDrop-0-Day-Exploit.webp","2026-11-11T13:57:20+00:00","2026-11-11T14:00:24.339615+00:00",8,[17,20,23,26],{"name":18,"type":19},"Windows","product",{"name":21,"type":22},"CLFS","technology",{"name":24,"type":25},"Microsoft","vendor",{"name":27,"type":19},"Windows Defender","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":28,"icon":30,"name":31,"slug":32},null,"Vulnerabilities","vulnerabilities",[34,39,41],{"category":35},{"id":36,"icon":30,"name":37,"slug":38},"574f766a-fb3f-487c-8d2c-0720ae75471b","Zero-day","zero-day",{"category":40},{"id":28,"icon":30,"name":31,"slug":32},{"category":42},{"id":43,"icon":30,"name":44,"slug":45},"e7b231c8-5f79-4465-8d38-1ef13aea5a14","Threat Intelligence","threat-intelligence",[47,51],{"type":48,"value":49,"context":50},"malware","SignDrop","Name of the public exploit targeting Windows CLFS.",{"type":52,"value":53,"context":54},"cve","CVE-2025-29824","Previously covered CLFS zero-day used with PipeMagic malware.",[24,18,27],{"controls":57,"vendors":143},[58,86,114],{"slug":59,"name":60,"problem":61,"products":62},"privileged-access-management","Privileged access management (PAM)","Admin accounts stop being one stolen password away from control of everything.",[63,70,78],{"vendor_slug":64,"vendor_name":65,"vendor_logo":66,"product_slug":59,"product_name":67,"url":68,"description":69},"threatlocker","ThreatLocker","\u002Fvendor-logos\u002Fthreatlocker.png","Privileged Access Management","https:\u002F\u002Fwww.threatlocker.com\u002Fcapabilities\u002Fprivileged-access-management","Gives elevated rights to specific applications only where needed, so users do not need local admin accounts.",{"vendor_slug":71,"vendor_name":72,"vendor_logo":73,"product_slug":74,"product_name":75,"url":76,"description":77},"wallix","WALLIX","\u002Fvendor-logos\u002Fwallix.png","wallix-pam","WALLIX PAM","https:\u002F\u002Fwww.wallix.com\u002Fproducts\u002Fprivileged-access-management-software\u002F","Privileged access management with session recording, for IT and OT environments.",{"vendor_slug":79,"vendor_name":80,"vendor_logo":81,"product_slug":82,"product_name":83,"url":84,"description":85},"palo-alto-networks","Palo Alto Networks","\u002Fvendor-logos\u002Fpalo-alto-networks.png","idira-privileged-access-management","Idira Privileged Access Management","https:\u002F\u002Fwww.paloaltonetworks.com\u002Fidira\u002Fhuman\u002Fprivileged-access-management","Privileged access management from the former CyberArk portfolio: vaulting, rotation, just-in-time access and session monitoring.",{"slug":87,"name":88,"problem":89,"products":90},"patch-management","Automated patch management","Known holes get closed in days, not months.",[91,99,106],{"vendor_slug":92,"vendor_name":93,"vendor_logo":94,"product_slug":95,"product_name":96,"url":97,"description":98},"action1","Action1","\u002Fvendor-logos\u002Faction1.png","action1-patch-management","Action1 Patch Management","https:\u002F\u002Fwww.action1.com\u002F","Cloud-native patch management for Windows, macOS and third-party applications.",{"vendor_slug":100,"vendor_name":24,"vendor_logo":101,"product_slug":102,"product_name":103,"url":104,"description":105},"microsoft","\u002Fvendor-logos\u002Fmicrosoft.png","intune","Microsoft Intune","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fbusiness\u002Fmicrosoft-intune","Device management for Windows, macOS, iOS and Android, including update rings and compliance policies.",{"vendor_slug":107,"vendor_name":108,"vendor_logo":109,"product_slug":110,"product_name":111,"url":112,"description":113},"ivanti","Ivanti","\u002Fvendor-logos\u002Fivanti.png","neurons-patch-management","Ivanti Neurons for Patch Management","https:\u002F\u002Fwww.ivanti.com\u002Fproducts\u002Fivanti-neurons-for-patch-management","Risk-based patch management for operating systems and third-party applications.",{"slug":115,"name":116,"problem":117,"products":118},"endpoint-detection-response","Endpoint detection and response (EDR and XDR)","Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.",[119,127,135],{"vendor_slug":120,"vendor_name":121,"vendor_logo":122,"product_slug":123,"product_name":124,"url":125,"description":126},"eset","ESET","\u002Fvendor-logos\u002Feset.png","eset-protect","ESET PROTECT","https:\u002F\u002Fwww.eset.com\u002Fint\u002Fbusiness\u002Fsolutions\u002Fendpoint-protection\u002F","Endpoint protection platform with detection and response add-ons.",{"vendor_slug":128,"vendor_name":129,"vendor_logo":130,"product_slug":131,"product_name":132,"url":133,"description":134},"sentinelone","SentinelOne","\u002Fvendor-logos\u002Fsentinelone.png","singularity-endpoint","Singularity Endpoint","https:\u002F\u002Fwww.sentinelone.com\u002Fplatform\u002Fendpoint-security\u002F","Endpoint protection and detection with automated response and rollback.",{"vendor_slug":136,"vendor_name":137,"vendor_logo":138,"product_slug":139,"product_name":140,"url":141,"description":142},"bitdefender","Bitdefender","\u002Fvendor-logos\u002Fbitdefender.png","gravityzone","GravityZone","https:\u002F\u002Fwww.bitdefender.com\u002Fen-us\u002Fbusiness\u002Fgravityzone-platform\u002F","Endpoint protection, detection and response platform.",[144],{"slug":100,"name":24,"logo_path":101,"roles":145},[146],"affected",{"slug":148,"title":149,"body":150,"framework_refs":151,"framework_notes":157},"unpatched-windows-clfs-0-day-enables-system-privilege-escalation","Unpatched Windows CLFS 0-Day Enables SYSTEM Privilege Escalation","A publicly released proof-of-concept exploit named SignDrop targets a zero-day flaw in Windows' Common Log File System (CLFS) protection mechanism, enabling local privilege escalation to SYSTEM level with no CVE or vendor patch available as of the disclosure date. Because the exploit code is openly hosted on GitHub, the barrier for threat actors to weaponize it is extremely low, dramatically compressing the window between disclosure and active exploitation. Organizations cannot rely on traditional patch-based defenses when no patch exists, making compensating controls and enhanced monitoring critical. The wide estimated install base affected means the potential blast radius is enormous, and any attacker who already has a foothold on a Windows machine could use this to fully compromise it.",[152,153,154,155,156],"CIS Control 7: Continuous Vulnerability Management (v8)","CIS Control 6: Access Control Management (v8)","NIST SP 800-53 SI-5: Security Alerts, Advisories, and Directives","MITRE ATT&CK T1068: Exploitation for Privilege Escalation","NIS2 Article 21(2)(e)",{"NIS2 Article 21(2)(e)":158,"CIS Control 6: Access Control Management (v8)":159,"CIS Control 7: Continuous Vulnerability Management (v8)":160,"MITRE ATT&CK T1068: Exploitation for Privilege Escalation":161,"NIST SP 800-53 SI-5: Security Alerts, Advisories, and Directives":162},"This point requires organizations to have processes for vulnerability handling and disclosure, covering how to respond when a public exploit exists but no vendor patch is yet available.","CIS Control 6 calls for enforcing least-privilege and restricting local logon rights, which would limit the attacker's ability to obtain the initial foothold required to trigger this local privilege escalation.","CIS Control 7 requires organizations to continuously assess and track vulnerabilities — including zero-days — and apply compensating controls when patches are unavailable, directly addressing the gap created by SignDrop having no patch.","SignDrop is a direct implementation of T1068, exploiting a vulnerability in a Windows kernel component (CLFS) to escalate from a normal user to SYSTEM privileges.","SI-5 requires organizations to receive and act on security advisories for newly discovered flaws, which is the primary mechanism for tracking this unpatched 0-day and implementing timely compensating controls."]